I'm not sure that I understand your post fully.
Are you suggesting that the upper classes are made up of a left-wing majority and that these then look-down on the middle or working classes or have I misunderstood? Happy to be corrected.
This is just my thoughts on the subject.
I think the upper classes have been detached from the common people for probably a couple of hundred years. But in recent years, when money for some as become easier to come by with certain jobs, we now have a middle class that some of them aspire to be upper class. They think money buys them class. In this country you are born in to a class, even if you become a billionaire you wouldn't be treated as upper class. But it doesn't stop those people trying. They are social climbers in the extreme.
Sometimes in life we are either born, or find ourselves, in a situation that though we allied to, are socially tricky. The easy thing is just to jump ship and tell them off. The harder path is to try and understand the situation and contribute in a positive way. As we see on the twitters, youtubes etc, most people haven't chose the harder path and instead encourage demonization for sections of the community that they don't agree with.
I would even so as far as to say that the upper middle classes find it easier to speak out about racism, and other discriminations, rather than face up to what they did to other 'lower class' white people.
As a disabled person the only people who have ever discriminated against me have been white people who think they are better than me. I've never had that attitude from other races. Now, if I was a left-wing middle class social climber it would be easy for me to go on a virtue signalling rant. But no, I fight for the common people, the disabled people and anyone else who is a genuine underdog, which is imho, the British way.